Assembling the HOKASU S35 Linear Luminaire

Linear LED lights - the most modern and fashionable solution. In this article we will tell you how to assemble a LED luminaire based on the LED profile U-S35.

Selecting a light source

The best solution when choosing LEDs for a linear luminaire will be LED modules.
At the moment, the highest quality and most advanced modules are products manufactured under the Japanese brand HOKASU.
The module is a rigid LED strip, which operates from DC voltage and has a small cutting ratio. The most damaging factor for LEDs is temperature. From the heat emitted by high-power ribbons, LEDs degrade (age), and as a consequence lose their original brightness. Very important is the removal of point heat, which is concentrated on the substrate at the base of the diode.

When installing the LED strip a thermal gap is formed. Both the adhesive layer and small air bubbles interfere with heat dissipation.
Rulers do not have this disadvantage because the board is soldered at the factory to an aluminum strip, which in turn is already attached to the surface.

Module specifications
  • Supply voltage, V: 24
  • Luminous flux, lm / m: 2800
  • Power, Вт / м: 26
  • LED size: 2835 (2.8x3.5мм)
  • Color temperature, K: 4000

Assembly process

Let's look at everything you need to assemble and describe the process in detail.


  • LED profile U-S35
  • End caps + hangers + brackets for surface mounting
  • LED modules HOKASU Q156
  • Power Source 24v 150w

LED modules are obsolete, new models you will find here


  • Soldering iron + Flux, tin
  • Multimeter
  • Unclenched for wires

1. First, we will try on the rulers in the profile and trim them to the size we need.
The cutting pitch of this module is 4 cm.

2. After we cut the ruler, it is advisable to check it for resistance, because after the first attempt, when I cut with a regular saw, the ruler was contacting (shorting) at the very edge. This is due to the fact that the substrate is conductive bare aluminum. And if you cut carelessly from the end, the conductor touches the substrate.

3. Next, we glue the rulers (they have a 3M adhesive layer) and solder all the rulers to each other.

4. Solder the wire at one end and close the screen.

(You need to make a hole for the wire and put it behind the profile, but we're not going to do that yet)

I connected the luminaire to a laboratory voltage source to see how much current the LEDs draw.

It is quite a common problem that when you connect powerful strips of more than 2m there is a voltage sag.

I got that the total power of the luminaire is 2.7*24 = 64.8W (26 W/m) The readings jumped from temperature, but the average is 26 W/m.
 Considering that the declared power of one module is 26W, I think it's perfect.